#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;
constexpr double PI = 3.14159265358979323846;

ll gcd(ll i,ll j){
    if(j == 0) return i;
    return gcd(j,i%j);
}

int main(){
    ll a,b;
    cin >> a >> b;
    ll res = gcd(a,b);
    double r = sqrt(res);
    if((ll)(r)*(ll)(r)==res||((ll)(r)+1)*((ll)(r)+1)==res||((ll)(r)-1)*((ll)(r)-1)==res){
        cout << "Odd" << endl;
    }else{
        cout << "Even" << endl;
    }
    return 0;
}